Polygyny should be legalized.
Contrary to popular notion, polygyny is detrimental to the average or below average man, but beneficial to all women.
This is because more women can have children fathered by the highest quality men, while the left-over, more homely women women can more easily find husbands from the over supply of average or below average men. Thus resulting in fewer old maids.
Polygyny is in accord with the workings of evolution and of evolved human nature.
Age of Reason, your argument is self-refuting. Anything that is against the interests of the average man, is detrimental to society, and thus, to everybody. It is not, to use the ecological term, "sustainable".
A stable society cannot survive if most men cannot realize their natural right to seek a marriage partner and establish a family. Men who can never achieve a marriage and children--- who cannot participate in the very foundation of natural society --- have no stake in the future of their own society.
They will become a criminal class, as in the poorer sectors of our society, where the government has "out-bid" men for the role of provider and source of security. Husbandless women with children have their EBT card as their husband; but the men become parasites or predators.
The alternative is to draft all the men into the army. Then you have an army of criminals.
This is not a formula for social stability. See #68